Telephone line concentrator



May 12, 1964 F. E. BLOUNT ETAL.

TELEPHONE LINE coNcENTRAToR Filed Oct.

29 Sheets-Sheet 1 A r roRA/Ey May 12, 1964 F. E. BLOUNT ETAL TELEPHONE lLINE coNcENTRAToR 29 Sheets-Sheet 2 Filed Oct. 31, 1960 Gm .mhal

EE. BLOUNT /Nl/gTO/a M E -ATOPNEY May 12, 1964 Filed oct. 31,

ATTORNEY May 12, 1964 F. E. BLouN'r ETAL 3,133,156

TELEPHONE LINE coNcENTRAToR Filed Oct. 3l. 1960 29 Sheets-Sheet 4 May l2, 1964 F. E. BLouNT ETAL 3,133,155

TELEPHONE LINE CONCENTRATOR Filed Oct. 31, 1960 29 Sheets-Sheet 5 May 12, 1964 F. E. BLouN'r ETAL 3,133,155

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TELEPHONE LINE coNcENTRAToR 29 Sheets-Sheet 7 Filed 0011. 3l, 1960 May 12, 1964 Filed Oct. 31, 1960 F. E. BLOUNT ETAL TELEPHONE LINE CONCENTRATOR l|||l| 1|l||v| llllll llllll null Illlll llllll IIIIII o Illlll llllll llllll llllll ||I||| IIIIII llllll IIIIII.

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TELEPHONE LINE CONCENTRATOR Filed oct. s1, 1960 29 sheets-sheet 9 ATTORNEY May l2, 1964 F. E, BLouN-r ETAL 3,133,156

TELEPHONE LINE CONCENTRATOR Filed Oct. 1960 29 Sheets-Sheet 10 l 1. 51mm? ATTORNEY May 12, 1964 F. E. BLOUNT ETAL 3,133,156

TELEPHONE LINE coNcENTRAToR Filed oct. s1, 19Go 29 sheets-sheet 11 May 12, 1964 F. E. BLOUNT ETAL 3,133,156

TELEPHONE: LINE coNcENTRAToR Filed Oct. '31, 1960 29 Sheets-Sheet 12 /M/EA/roRs E E BLOUNT By M E. KRM '5 E ATTORNEY May 12, 1964 F. E. BLOUNT ETAL 3,133,156

TELEPHONE LINE coNcENTRAToR 29 Sheets-Sheet 13 Filed Oct. 31, 1960 Pals /NVENTORS ATTORNEY May 12, 1964 F. E. BLOUNT ETAL 3,133,156

TELEPHONE LINE CONCENTRATOR Filed oct. 31, 19Go 29 sheets-sheet 14 A TTORNEV May 12, 1964 F. E. BLOVUNT ETAL 3,133,156

TELEPHONE LINE: coNcENTRAToR Filed Oct. 3l, 1960 29 Sheets-Sheet l15 A 7|' TORNE V May 12, 1964 F. E. BLouNT ETAL 3,133,156.

TELEPHONE LINE CONCENTRTOR Filed 0G13. 3l. 1960 29 Sheets-Sheet 16 A TTO/PNEV May 1 2, 1964 F. E. BLoUNT ETAL TELEPHONE LINE coNcENTRAToR 29 Sheets-Sheet 17 Filed Oct. 51, 1960 sa V A hws V A kbk VA hubbvA YMWN Vil;

YWWN VA F. E. BLOUNT NVE/v7.05; M. E. KROM SEAQQQMM ATTORNEY k b .NONE 20D k hsv NWN V May 12, 1964 F. E. BLOUNT ETAL.

TELEPHONE LINE coNcENTRAToR 29 Sheets-Sheet 18 Filed Oct. 51, 1960 .QED Mk OSG@ WMV MM mg Wm BK T EM. E 5 m w Qu May 12, 1964 F. E. BLouN'r ETAL.

TELEPHONE LINE CONCENTRATOR 29 Sheets-Sheet 19 Filed Oct. 31. 1960 A T TORNEV May 12, 1964 F, E. BLouN'r ETAL 3,133,156

TELEPHONE LINE CONCENTRTOR Filed oct. 51, 1960 29 sheets-sheet 2o A TTORNEV 

1. A UNIVERSAL TELEPHONE LINE CONCENTRATOR SYSTEM INCLUDING A PLURALITY OF LINES, A TELEPHONE CENTRAL OFFICE, A PLURALITY OF TRUNKS FEWER IN NUMBER THAN SAID LINES CONNECTED TO SAID OFFICE, REMOTE SWITCHING MEANS FOR CONNECTING SAID LINES TO SAID TRUNKS, AND IDENTIFICATION MEANS IN SAID REMOTE SWITCHING MEANS RESPONSIVE TO AN OFF-HOOK CONDITION ON ONE OF SAID LINES FOR INDICATING THE IDENTIFICATION OF SAID LINE, SAID IDENTIFYING MEANS INCLUDING A FIRST GROUP OF BISTABLE DEVICES ARRANGED IN A PREFERENCE LOCKOUT CHAIN, A SECOND GROUP OF BISTABLE DEVICES ARRANGED IN A PREFERENCE LOCKOUT CHAIN, MEANS FOR OPERATING ONE OF SAID BISTABLE DEVICES IN SAID FIRST GROUP AND ONE OF SAID BISTABLE DEVICES IN SAID SECOND GROUP TO UNIQUELY IDENTIFY SAID LINE, AND MEANS CONNECTED TO SAID FIRST AND SECOND GROUP TO BLOCK THE OPERATION OF SAID ONE BISTABLE DEVICE IN SAID SECOND GROUP UNTIL SAID ONE BISTABLE DEVICE IN SAID FIRST GROUP HAS OPERATED. 